<template>
  <div>
    <!-- 面包屑导航区域！可以分装成为一个组件 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input placeholder="请输入内容"
                    v-model="queryInfo.query"
                    clearable
                    @clear="getGoodsList">
            <el-button slot="append"
                       icon="el-icon-search"
                       @click="getGoodsList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary"
                     @click="goAddPage">添加商品</el-button>
        </el-col>
      </el-row>
    </el-card>

    <!-- table表格区域 -->
    <el-table :data="goodsList"
              border
              stripe>
      <!-- 索引列 -->
      <el-table-column type="index"></el-table-column>
      <el-table-column lable="商品名称"
                       prop="goods_name"></el-table-column>
      <el-table-column lable="商品价格(元)"
                       prop="goods_price"
                       width="95px"></el-table-column>
      <el-table-column lable="商品重量"
                       prop="goods_weight"
                       width="70px"></el-table-column>
      <el-table-column lable="创建时间"
                       prop="add_time"
                       width="140px">
        <template slot-scope="scope">
          {{scope.row.add_time|dateFormat}}
        </template>
      </el-table-column>
      <el-table-column lable="操作"
                       width="230px">
        <template slot-scope="scope">
          {{scope.add_time}}
          <el-button type="primary"
                     icon="el-icon-edit"
                     size="mini">编辑</el-button>
          <el-button type="danger"
                     icon="el-icon-delete"
                     size="mini"
                     @click="removeById(scope.row.goods_id)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 分页区域 -->
    <el-pagination @size-change="handleSizeChange"
                   @current-change="handleCurrentChange"
                   :current-page="queryInfo.pagenum"
                   :page-sizes="[5, 10, 15, 20]"
                   :page-size="queryInfo.pagesize"
                   layout="total, sizes, prev, pager, next, jumper"
                   :total="total"
                   background>
    </el-pagination>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 查询参数对象
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 10
      },
      // 商品列表
      goodsList: [],
      // 商品总条数
      total: 0
    };
  },
  created () {
    this.getGoodsList();
  },
  methods: {
    // 根据分页获取对应的商品列表
    async getGoodsList () {
      const { data: result } = await this.$http.get('goods', { params: this.queryInfo })
      if (result.meta.status !== 200) return this.$message.error('获取商品列表失败!')
      this.goodsList = result.data.goods
      this.total = result.data.total
    },
    // 分页大小改变
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodsList();
    },
    // 页码改变
    handleCurrentChange (newNum) {
      this.queryInfo.pagenum = newNum
      this.getGoodsList();
    },
    // 删除商品数据
    async removeById (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该商品，是否继续？', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if (confirmResult !== 'confirm') { return this.$message.info('已经取消删除!') }

      const { data: result } = await this.$http.delete(`goods/${id}`)
      if (result.meta.status !== 200) return this.$message.error('删除失败!')
      this.$message.success('删除成功!')
      this.getGoodsList();
    },
    // 添加商品
    goAddPage () {
      // 通过路由导航跳转到添加页面
      this.$router.push('/goods/add')
    }
  }
}
</script>

<style lang='scss' scoped>
</style>
